Krerowo was a private church village, administratively located in the Pyzdry County in the Kalisz Voivodeship in the Greater Poland Province.

[2] During the German occupation of Poland (World War II), a local teacher was among the victims of a massacre of Poles committed by the Germans in nearby Środa Wielkopolska on 20 October 1939 as part of the genocidal Intelligenzaktion campaign.

[3] In 1940–1941, the occupiers carried out expulsions of Poles, whose houses and farms were then handed over to German colonists as part of the Lebensraum policy.

[4] Poles expelled in 1940 were placed in a transit camp in Łódź and then deported to the General Government in the more eastern part of German-occupied Poland, whereas Poles expelled in 1941 were enslaved as forced labour and sent either to Germany or to new German colonists in the county.

[4] The landmarks of Krerowo are the local palace and the Gothic Saint John the Baptist church.